package com.sky.interceptor;


import com.sky.constant.JwtClaimsConstant;
import com.sky.context.BaseContext;
import com.sky.properties.JwtProperties;
import com.sky.utils.JwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Slf4j
@Component
public class JwtTokenUserInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;


    /**
     * 校驗jwt
     * @param request
     * @param response
     * @param handler
     * @return
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {

//       判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
//            当前拦截到的不是动态方法，直接放行
            return  true;
        }

//        從請求頭中獲取令牌
        String token = request.getHeader(jwtProperties.getUserTokenName());

//        校驗令牌
        try {
            log.info("jwt令牌校驗：{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getUserSecretKey(), token);
            Long userId = Long.valueOf(claims.get(JwtClaimsConstant.USER_ID).toString());
            log.info("當前用戶ID：{}", userId);
            BaseContext.setCurrentId(userId);
//          通过，放行
            return true;
        } catch (Exception  e) {
            response.setStatus(401);
            return false;
        }
    }

}
